STUDY OF POLYTETRAFLUOROETHYLENE CRYSTALLIZATION

被引:24
作者
FERRY, L [1 ]
VIGIER, G [1 ]
VASSOILLE, R [1 ]
BESSEDE, JL [1 ]
机构
[1] GEC ALSTHOM,F-69611 VILLEURBANNE,FRANCE
关键词
D O I
10.1002/actp.1995.010460403
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Crystallization of polytetrafluoroethylene (PTFE) from the melt state has been studied by wide angle X-ray scattering (WAXS), small angle X-ray scattering (SAXS) and differential scanning calorimetry (DSC) experiments, supported by scanning electron microscopy (SEM) observations. Isothermal crystallization of PTFE (between 315 degrees C and 325 degrees C) is analyzed and compared with PTFE cooled at 1 degrees C/min taken as the reference. We establish a TTC (time, temperature, crystallization) diagram and point out the time and temperature dependence of both crystallite thickness acid crystallinity. It appears that the crystallization occurs in a very narrow temperature range. We assign the morphological changes to different crystal growth regimes in the range of study.
引用
收藏
页码:300 / 306
页数:7
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